Perpetual date calendar



Feb. 14, 1939. J. G. PAULIN PERPETUAL DATE CALENDAR Filed April 1, 1936 3 Sheets-Sheet l Feb. 14, 1939. 1 G. PAUUN v 2,146,981

` PERPETUAL DATE CALENDAR ivf/mw V32 /06 V# V25 .W7 d

Feb. 14, 1939. J. s. PAULIN PERPETUAL DATE CALENDAR Filed April l. 1956 3 Sheets-Sheet 3 Patented Feb. 14, 1939 v @UNITED ls 'mr-E-s PAT-ENT orme-E* YApplication April 1,' 1936, Serial No. l'72,160 In `Sweden April'9, 1935 1s claims. (o1. VLio- 112) My invention relates to vperpetual date calendars for automatically indicating the correct date. A calendarofthis type usually comprises a week- 4day member, a date membena month member 5 and a year member, which may have the form of coaxial, -revoluble discs or rings, although cylinders, endless bands or other suitable components may be used. These members are provided with Week-day, date, month and year indi- 15 cations, usually arranged in continuous circuits, or they may be connected to or coupled with members provided with such indications. The change-over ltakes place once in every twentyfour hours, either by hand or from a time-keeper,

in the latter case usually at twelve oclock in the night. The week-day member is then always shifted one `week-day step and the date member always at least one date step. The month member may be adapted to be shifted responsive to l themovement of the date member in such manner, that for each time the date member is shifted lfrom the thirty-'first tothe rst the month member is 'shifted one month step. The year member may `likewise be adaptedtobe shifted responsive to the movement of the month member so that each time the month member is shifted from December'to January the year member is shifted one year step. VThe movements of the week-day, month and year members are unifornyi. e., these 39 members are always shifted only one step at a time.V The movement of the date member on the other hand is not uniform and therefore is more difficult to accomplish. At the change-over from a month having thirty-one days to the next 35 month the shifting of the date member can` be accomplished in the normal way by means of a single step feed. At the change-over froma .month having thirty days to `the next month, however, there is required, in addition to the 40 normal single step feed, a surplus feed vof one step, thus from the th direct to the rst. Similarly at the change-over from February to March a surplus feed of three steps is required, i. e., `direct fromthe 28th to lst.- If thefcalendar is also to allow for leap year, then itmust be arranged, once in every period of .four years, to -shift the date member from the 29th vdirect to the 1st, i. e., one normal step and'two surplus steps.

.50 The surplusfeed of the date member may be effected by the same feed mechanism which effects the normal feed of the date calendar or by a separate feed mechanism and is usually controlled by the month member through theinter- ,55 fmediary-of more or less complicatedidevices.

yThis Ydeflection has to My invention has for--its object toprovidea mechanism Afor effecting the surplusfeed-of the date member which-is simple in construction and reliable in function. For this purposeI provide the month member with a-surplus feed control .i5 curvature -having deflections at points so .dis-

posed, when in operative positions, relatively to the date member as to correspondwith those positions of the date member in which a-surplus feed is required and zoperative vto cooperate with the l0 feed mechanism for thedatemember forcontrolling the surplus feed. If thefdate memberl has thirty-one continuous date steps` no curvature deflections are needed for the January, March,

May, July, August, October and December l5 months, which-.require no surplus feed. For each of the April, June, .September and November months, which-require@ surplus .feed of .onedate step, Iprovide a curvature deflection so disposed when in .the operative position, as to initiate .a 20 'surplus feed action on the 30th. For a February month Ahaving twenty-eight days and requiring a surplusfeed of threedate steps I provide a delflection so disposed, when .inV the operative position, as Ltoinitiatea. surplus feedaction `on the 2K5 28th. This deflection has to be displaced relatively tothe aforesaid deflections, not only an extent oran angle corresponding to the difference in month-stepsbut also anextent or an angle corresponding to two Adate steps. For a February 30 month .having twenty-ninedaysand requiring a surplus feed of two datesteps tI providea deflection so disposed, .when .in rthe operative kposition,

as to initiate `a surplus feed action on they 29th.

be displaced relatively the deflections causinga surplus feed of one date step notonly an'extent or an angle corresponding Vto the difference in .month steps but also` an extent or an angle corresponding to one date step. `40

The deflections may be obtained by the use of cams for indentations, `and the peripherical lengths of these cams Lor indentations .may-be utilized for maintaining the .feed mechanismin `engagement with-the date member during the surplus feed so .that .the surplus feed `is effected responsive to V the :length of the cams orindentations. Thus if the-date member has thirty-one ner responsive to the length of the cams or indentations ofthe month member there is, however, the following difficulty to take'into account. The shifting of the date member from the 28th of February to the 1st of March represents four date steps, i. e., one normal step and three surplus steps. These three surplus steps represent an angle displacement of the date member :/gl of the whole periphery =3/31 360= about 35. As the surplus feed is to be effected responsive to the lengthof the cams or indentations, the February cam or indentation should have a peripherical length corresponding to an angle of about 35. If however the month member for each shifting is to be turned 112 of a complete revolution =30, then vthe February cam or indentation cannot be given the required length corresponding to an angle of 35, as in that case it would encroach upon the part of the month curvature reserved for the following month. VThis diiculty may be overcome in different ways, for example by making the February cam or indentation somewhat shorter than the length which corresponds to a full surplus feed and to effect the rest of the surplus feed by means of the ordinary feed movement. The feed member of the feed mechanism which effects the normal one step feed of the date member is then adapted to come into operation somewhat earlier than otherwise necessary for effecting the normal feed of the date member. The said diiculty may also be overcome by the use of snap mechanisms which complete the movement of the date member. It is also possible to provide the date member with two consecutive series of date steps, so that the angle displacement of the date member relatively the month member is halved.

-The feed mechanism for the date member may comprise two feed members, one for effecting the normal one step feed and one for effecting the surplus feed of the date member. The surplus feed member may be adapted to cooperate directly with the curvature of the month Vmember by moving along this curvature. On the other hand it is possible to use only one feed member which effects not only the normal but also the surplus feed of the date member and in that case I prefer to provide a separate surplus feed control member which is adapted to move along the curvature of the `month member and cooperate with the surplus feed member for controlling the surplus feed.

In the accompanying drawings areillustrated two of various possible embodiments of my invention. Fig. 1 shows a front view of the one embodiment with part of the front frame plate broken away to show the interior of the mechanism, Fig. 2 show s a section along line II--lI in Fig. 1 with the driving member raised to the position indicated at A and Fig. 3 shows a section along line III- III in Fig. 1. Fig. 4 shows a front view of the second embodiment with part of the front frame plate broken away, Fig. 5 shows a section along the line V-'V in Fig. 4 with the driving member raised'to the vertical position and Fig. 6 shows va section along line VI-VI in Fig. 4. Fig. 7 shows a section along line VII-VII in Fig. 5 and with the driving member in the position indicated at A in Fig.- 4. Fig. 8 is a detail view ofthe driving member shown in Figs. 4-7 removed; and, Fig. 9 is a fragmentary front view of the calendar.

In Figs. 1-3 the numeral I denotes-the rear frame plate of the calendar work and 2 the front frame plate, part of which has been broken away to show the interior of the mechanism. The plates are held together by four posts 3 secured to the plates by means of screws 4. In holes 5 and 6 in the frame plates is revolubly mounted a shaft 7 on which the main parts of the calendar mechanism are mounted.

8 denotes the week-day member which is revolubly mounted on the shaft 'I adjacent the rear frame plate and provided with seven equidistant notches 9. Adjacent the week-day member is mounted the date member I which is also revoluble on the shaft I and provided with thirtyone teeth II. The date member is also provided with two pins I2 and I3the functions of which will be explained in the following.

On the shaft 'I is further revolubly mounted a hub I4 to which is riveted a gear Wheel I 5 having twelve teeth I6, further the month member I'I, which at its periphery is provided with the surplus feed control curvature having four indentations I8 of equal length and an indentation I9 which has about three timesthe length of the indentations I8. The indentations I8 correspond to the thirty day months April, June, September and November, and the indentation I9 corresponds to the February month. Pivotally supported at the month member II by means of a screw 2U is an arm 2|, the free end of which is formed into a leap year control member 22 adapted to cooperate With the indentation I9. The. leap year control member 22 is provided with a projection 23 adapted to bear against a leap year member to be described in the following. Movement of the arm 2I in the outward direction is limited by a stop pin 24 secured to the month member. Between the gear wheel I and the month member I'I the hub I4 is provided with teeth 25.

The shaft I further carries rigidly secured thereto and in the same plane as the leap year control member 22 a leap year member 25 provided with three equidistant cams 2'I. To the leap year member is riveted a gear wheel 28, which in Fig. 1 is shown as partly broken away.

Adjacent the front rframe plate 2 is further revolubly mounted on the shaft 'I a driving member 29. To the driving member are fixed three posts 3D, 3|, 32, each carrying a pawl 33, 34, 35

revolubly secured to the posts by means of screws 36, 37, 38. Each pawl is provided with a pin 39, 40, 4I engaged by a leaf spring 42, 43, 44 attached to the posts by means of rivets 45, 45, 4l. The post 30 is long enough to enable the pawl 33 to cooperatewith the week-day member 8 and similarly the post 3| is long enough to enable the pawl 34, the normal feed member, to cooperate with the date member I0. The pawl 35, the surplus feed member, is adapted to cooperate with the month member I'I and the leap year control member 22 and is provided with an extension 48 long enough to cooperate with the pin I2 on the date member I0.

To the rear frame plate I is by means of screws 49 fixed a guide member 50 which is adapted to cooperate with the pawl 34. The effective part of the guide member 5I) is therefore raised from the rear frame plate to the'plane of the pawl 34, at the same time providing a clearance space for the week-day member 8.

The driving member 29 together with the pawls 33, 34, 35 forms the feed mechanism.

To the rear frame plate I is further by means of screws 5I fixed an angle support 52 carrying a gear wheel 53 revolubly secured to the support by meansof a screw 54 and having six teeth 55.

The gear wheel 53 is in the same plane as and engages with `the gear wheel I5 and is further adapted .to cooperate with the driving pin I3 on lthedate member I0. 1 To-lthe front frame plate 2 Vis rigidly secured an auxiliary shaft 56 on which is `journalled a 1hub'5'I retained by'ascrew -58 and carrying two gear wheels 59,- 60 made integral therewith. The gear Wheel 59 is in the'same plane as andengages -With the teeth A25 `on the hub I4, and the gear `Wheel 60 is in the same plane as and engages with Vthe gear wheel 28 secured to the leap year member 2B.

Three pawls 6I, 62, 33 are pivotally secured to a vpost 94 vfixed to the rear frame plate I and engaged by springs 65, 56, S'I also secured to the rear frame plate at 68, 69. The pawl 5I engages with the teeth I6 of the gear wheel I5 and the -fengagingend thereof is so formed as to com- :ple'te the movement of the gear wheel I5 and to adjust-it to its correct positions. The pawl 52 engages with the date member I0 and serves to adjust this to its correct positions, further to prevent movement thereof except in the direction of the arrow Yindicated thereon. Similarly the -pawl 63'engages with the week-day member 8 and serves to prevent Athis member from revolvingexcept in the direction of the arrow indicated thereon. l

The mechanism functions as follows.

The calendar position shown in Fig. 1 is that of the 28th of February a year which is not a 'leap year. In order to facilitate the understand- Ling of the functioning of the mechanism it is, however, preferable to assume at first that rthe calendar position is that of the 27th of February and that the date member I0 is displaced one date step in a clockwise direction sothat the pin I2, as seen in Fig. 1, is covered by the outer periphery of the month member l1. The driving member 29 is shown in its normal position. At twelve oclock in the night it moves in an anticlockwise direction an angle roughly corresponding to the distance between two notches 9 on the week-day member 8. The pawl 33 engages with one of the notches 9 and shifts the week-day member-'8 -one week-day step inthe direction of 'the arrow indicated thereon. The pawl 34 is at rst held by the guide member 59 in the inactive position but when arriving at the position shown indotted lines at 'I0 it is released and after a fur-ther short movement of the driving member 29 engages with one of the teeth II on the date member I0 and shifts the date member one date step in the direction of the arrow, i. e., to the 28th. -The pawl 35 drops into the Februaryindentation I9 and moves along the bottom of this indentation but 'withoutY engaging with the date member. The driving member 29 then returns to `the normal position and the calendar now is in the position corresponding to the 28th of February, which is the position shown in Fig. 1. It is to be noted that the shifting of the date member I0 brought the pin I2 into the position shown in Fig. 1.

Qn the 28th of February at twelve oclock in the night the driving member 29-again starts on its active feed movement. The week-day member 8 is shifted one step as before. The pawl 35, however, drops into the indentation I9, engages with the pin I2 and shifts the date member `Il! a little more than two steps (the surplus feed), whereafter the pawl 35 moves up from the indentation l9 and releases the pin I2. At this moment, however, the feed is taken over by the pawl 34, which is now in the v.position indicated ,atul'I0 4by the pawl 6I.

.inthe position shown in Fig. 1.

= and engageswith one-of Athe teeth I I ofthe date The date *member L0 is thus moved `foursteps from the 28th direct to the 1st.

At the same time the month member I'I and lthe leap year member 26 are also shifted by means of thev driving pin I3. When the date member I0 has moved three steps in the direction ofthe Varrow, i. e., to the position correspondingto the 31st, the driving pin I3 is close to oneof the teeth 55 on the gear wheel 53, and when the date member moves the last step from the 31st to the 1st the driving pin I3 turns the gear wheel -53 somewhat less than one sixth of a complete revolution. As the gear wheel 53 is in engagement with the gear wheel I5 this latter is turned somewhat less than one-twelfth of a complete revolution. 'Ihe movement is completed With the gear wheel I5 the month member II is also. turned one-twelfth of a complete revolution in the-direction of the arrow, andthe gear wheel 25 by means of the gear wheels 59, 60, 28 turns the leap year member 2B one one-hundred-fo-rty-fourth of a complete revolution. The calendar is ynow in the position corresponding to the 1st of March.

The shifting of the week-day member 8 and the date member I0 now proceeds in the normal way. At the end of the March month the pin I2 is again in the position shown in Fig. 1 but is now covered by the outer periphery of the month member I'I so that no surplus feed can take place. The date member I0 istherefore shifted in the normal way, i. e., one step, on the 28th and like- `Wise-on the 29th, the 30th and the 31st. Simultaneously with the shifting from the 31st to the 1st the driving pin I 3 again comes into action and shifts the month member I'I Aand the leap year member 2B as before. The April indentation I8a has now been displaced an angleof 60 in a clockwise direction, so that the side I8b` thereof coincides with the side ISb of the indentation I9 The deflecting side of the indentation I8 is, however, displaced an angle approximately corresponding to two date steps from the deflecting side of the indentation I9. At the end of the April month the pawl 35 engages with the pin I2 but not until this is in the position corresponding to the 30th, and the pawl and the pin thus shift the date member on the 30th one surplus step in addition to the normal step, i. e., from the 30th to the 1st.

On the 28th of February one year later the various parts are all in Athe positions shown in Fig. 1, except that the leap year member 26 is displaced an angle of 30 in the direction or' the arrow. After the lapse of a further year the cam 21a is in a position in which it engages with the projection 23 on the leap year control member 22 and holds this member in a position in which it covers the pin I2 on the 28th. There is therefore no surplus feed on the 28th of February this year and the date member is shifted only the normal step to the 29th. On the 295th, however, the pawl 35 engages with the pin I2 Yand causes the date member I0 to be shifted from the 29th direct to the 1st.

In Figs. 4 9 the numeral I0`I denotes the rear frame plate of the calendar work and |02 the front frame plate, part of which has been broken away to show the interior mechanism. 'Ihe .plates are held togetherl by four posts |03 secured to the plates by means of screws |04. In holes and |06 in the frame plates is revolubly mounted a shaft |01 on which the main parts of the calendar mechanism are mounted.

Adjacent the rear frame plate |0| is revolubly mounted on the shaft |01 a driving member |08, which in Fig. 4is shown in its normal position and in Fig. 5 raised into its vertical position. To the driving member |08 is attached at |09 a post ||0 and to this post is swingably secured by means of a screw a pawl ||2. VThe pawl ||2 is provided with an elongated hole ||3 through which the screw |l| passes, so that the pawl 2 has not only a swinging but also a sliding movement relatively the driving member |08. One end of the pawl ||2 is formed into a point ||4 adapted to cooperate with the date member described in the following. The other end of the pawl is turned up at ||5 into the same plane as the month member described in the followingrand formed into a hook H6. The driving member |08 is further provided with an extension ||1 towhich is xed a stop pin ||8 for limiting the swinging movement of the hook end of the pawl ||2 in an inward direction. To the driving member |08 is further fixed a post ||S carrying a leaf spring |20 the free end of which rests against the pawl ||2 so as to normally hold it against the stop pin ||8. To the hook end of the pawl ||2 is fixed a guide pin 2| adapted to cooperate with a guide member to be described in the following.

Adjacent the driving member |08 is rigidly secured to the shaft |01 a gear wheel |22 having twelve teeth |23. The gear wheel |22 is provided with a hub |24 on which is revolubly mounted the date member |25. The date member |25 is in the same plane as the point ||4 of the pawl `||2 and is provided with thirty-one teeth |20 adapted to cooperate with the pawl ||2. To the date member l|25 is fixed a driving pin |21 adapted to cooperate with a gear wheel to be described o in the following. The date member |25 is further provided with an elongated opening |20, in which is located a leaf spring |29. One end of the leaf spring |29 is secured to the date member at |30 and the other end carries a surplus feed control member |3| which by the leaf spring |29 is held against the curvature of a month member to be described in the following and which is broad enough in an axial direction to bear against not only the curvature of the month member but also against a leap year control member carried by the month member.

Each of the teeth |26 on the date member |25 is provided with one of the calendar indicia between and 3|. This is best illustrated in Fig. 7 which also shows a window |05 provided in a suitable position in the structure for reading the indicia, preferably in the front plate |02.

To the shaft |01'is further` rigidly secured the month memberv |32 which is in the same plane as and is adapted to cooperate with the hook endl H6 of the pawl H2. The month member |32 is provided with four short cams |33, corresponding to the four thirty day months in the year, and further with a cam |34. which has about twice the peripherical length of the aforo,- said cams and which corresponds to the February month. An arm |35 is swingably secured to the month member by a screw |36 and the free end of this arm is formed into a leap year control member |31 adapted to cooperate with the surplus feed control member |3| and further with a leap year member to be described in the following. Ihe leap year control member is provided` with a projection |38 adapted to bear against thel said leap year member. The movement of the arm |35 is limited in an outward direction by a stop pin |39 fixed to the month member |32.

The month member |32 is provided with a hub |40 and on this hub is revolubly mounted a leap year member |4| made integral with a gear wheel |42, part of which has been broken away in Fig. 1. The leap year member |4| is provided with three indentations |43 adapted to cooperate with the projection |38 on the leap year control member |31.

Adjacent the gear wheel |42 is rigidly secured to the shaft |01 a gear Wheel |44.

A gear wheel |45 is revolubly secured to the rear frame plate |0| by means of a screw |46 and engages with the twelve-toothed gear wheel |22, The six-toothed gear Wheel |45 is adapted to be actuated by the driving pin |21 on the date member |25.

Two gear wheels |41, |48 made integral are revolubly mounted on the front frame plate |02 by means of a screw |49. 'I'he gear wheel |41 engages with the gear wheel |44 secured to the shaft |01, and the gear wheel |48 engages with the gear wheel |42 made integral with the leap year member |4I. It will be seen that when the driving pin |21 actuates the six-toothed gear Wheel |45 in the direction indicated by the arrow the month member |32 and the leap year member |4| are also turned in the directions indicated by the arrows. This action is the same as explained with reference to Figs. 1-3.

A guide member |50 is attached to or made integral with the front frame plate |02 and adapted to cooperate with the guide pin |2| on the pawl ||2.

Two pawls- |5|, |52 are pivotally secured by means of a screw |53 to a post |54 fixed to the rear frame plate |0| and engaged by springs |55, |56. The spring |55 is secured to the rear frame plate at |51. The spring |56 is secured to a post |58 fixed to the rear frame plate. The pawl V|5| engages with the teeth |23 of the twelve toothed gear wheel |22, and the engaging end |59 thereof is so formed as to complete the movement of the gear wheel |22 and to adjust it to its correct position. The pawl |52 engages with the teeth I 28 of the date member |25 and serves to hold this-in its correct position, further to prevent movement thereof except in the direction of the arrow.

The mechanism functions as follows.

The calendar position shown in Fig. 4 is that corresponding to the 28th of February a year which is not a leap year. In order to facilitate the understanding of the functioning of the mechanism it is, however, preferable to assume at first that the calendar is in the position which corresponds to the 27th of February and that the date member |25 is displaced one step in a clockwise direction so that the surplus step control member |3| attached to the date member has not yet mounted the leap year control member |31. 1n this position the indicium 27 appears in the window |65.

The driving member |08 is shown in Fig. i in its normal po-sition. At twelve oclock in the night it moves inactively to the position indicated in dotted lines at A in Fig. 4 and in full lines in Fig. 7. During this movement the guide pin |2| at first glides along the upper face of the guide member |50 but the pivotal and sliding connection of the pawl ||2 enables the point Vreference to Figs. 1 3.

' normal A28th of February this year.

||4 to slide over the teeth |26 of the date meuk ber |25. The guide pin |2| is then released from the guide member |50 so that the pawl ||2 comes to rest against the stop pin ||8 and the point ||4 is turned up from the teeth |26. When the driving member returns from the position shown at A to its normal position, the pawl ||2 at kfirst remains at rest against the stop pin ||8, but when the driving member |08 has moved an angle corresponding. to somewhat more than t two steps of the date member |25 the guide pin |2| runs up on the guide member |50 and the point ||4 is -forced down into engagement with one of the teeth |26, thus shifting the date member |25 one date step, i. e., from the 27th to the 28th. At the same time the surplus feed control member |3| moves one step in the same direction as the date member |25 and mounts the leap year control member |31, as shown in Fig. 4. The position of the various parts isy now exactly that shown in Fig. 4.

At twelve oclock on the 28th of February the driving member again moves to the position indicated at A, but this time the hook I6 is forced up on the surplus feed control member |3| so that the point 4 is forced into engagement with the tooth |26@ as shown in Fig. '1. When the driving member |08 returns to its normal position the surplus feed control member |3| moves along the periphery of the leap year control member |31 and the ordinary February cam |34, thus maintaining the pawl ||2 in engagement with the tooth |26a. 'I'he guide pin |2| then runs -up on the guide member |50 and takes over the feed when the surplus feed control member drops Vdown on the other side of the February cam |34.

In this manner the date member |25 is shifted in one operation from the 28th direct to the lst that is to say the indicium l now appears in the window |65.

When the date member |25 is shifted from the 31st to the lst the driving pin |21 engages with the six toothed gear wheel |45 and shifts the month member |32 and the leap year member |4| in exactly the same way as described with The calendar is now in the position corresponding to the lst of March, and the shifting of the date member |25 proceeds in the normal way. On the 28th of March the surplus feed control member |3| is again in the position shown in Fig. l but now rests against a part of the month curvature where there is no cam and therefore does not actuate the pawl |2. The date member |25 is therefore shifted in the way, i. e., only one step for each effective movement of the driving member |08. Simultaneously with the shifting from the 31st to the lst the driving pin |21 again comes into action and shifts the month member |32 and the leap year member |4| as before. The April cam |3311l now occupies the position of the February cam |34 as shown in Fig. l, and at the end of the month the pawl l2 engages with the date member |25 on the 30th so as to shift this member from the 30th direct to the lst.

On the 28th of February two years later the indentation |4311 of the leap year member |4| is in a position in which it cooperates with the projection |38 on the leap year control member |31, so that the outer periphery of the leap year control member |31 is below the level of the cam |34. There is therefore no surplus feed on the On the 29th 'of Feb- V4ruary, however, the surplus feed control memper |3| hasmounted the ordinary February cam |34 and causes the date member |25 to be-shifted from the 29th direct to the 1st..

The leap year member may be provided with indications or the like indicating whether the current year is a leap year or not and also what the position of the current year is in the leap year period, as shown at |60 in Fig. 4. The line, when in the upper position, indicates that the current year is a leap year, and the dots, when in the upper position, indicate that the current year is a year before or after leap year.

It is to be noted that in the embodimentsv shown the cams and the indentations are displaced relatively to each other angles of 60, 60, 90, 60 and 90 degrees respectively Characteristic for my invention is the special shape of the surplus feed control curvature, the members 35 and I2 which move in contact with the surplus feed control curvature during the surplus feed period and in one case control and effect the surplus feed and in the other case control the engagement of the feed member for effecting the surplus feed, that the lengths of the cams |33, |34 or the indentations I8, I9 are utilized for maintaining the engagement of the surplus feed member with the date member during the surplus feed, the transfer of the surplus feed to the normal feed at a point where the' surplus feed is not completed, that in the embodiment shown in Figs. 4-9 the same feed member is utilized for effecting the normal as well as the surplus feed, the movable leap year control member for controlling the surplus feed at the end of February, the leap year member for controlling the movements of the leap year control member, the providing of the leap year member with indications indicating the position of the current year in the leap year period and the simplicity of the whole construction.

What I claim as new and desire to secure by Letters Patent of theUnited States of America 1. A perpetual date calendar comprising a revoluble date member adapted to be moved step by step, a revoluble month member adapted to be moved step by step and provided with a surplus feed control curvature having deflections for controlling the surplus feed of the date memberangularly displaced, but having the same radial displacement relatively to each other, in month and date steps so as to control the surplus feed of the date member merely by their angular displacements, means operative to advance the month member a complete month step for each shifting of the date member from the position corresponding to the thirty-first of one month to the position corresponding to the first of the following month, a feed mechanism for the date member having a reciprocating movement corresponding to at least the greatest number of date steps required for shifting the date member from the last day of one month to the first day of the following month and operative to effect the normal one-step feed of the date member, and means having an angular motion about the axis of the month member and adapted for each operation of the feed mechanism at the end of a month to move along and in contact with that part of the surplus feed control curvature of the month member which is in the operative position and together with the feed mechanism control and effect the surplus feed of the date member.

2. A perpetual date calendar comprising a revoluble date member adapted to be moved step by step, a revoluble month member adapted to be moved step by step and provided with a surplus feed control curvature having peripherical guide faces comprising cams and indentations integral with the month member, the angular sides of which are adapted to determine the time for operation of the surplus feed and the peripherical lengths of which are adapted to determine Ythe length of the surplus feed, means operative to advance the month member a complete month step for each shifting of the date member from the position corresponding to the thirty-first of one month to the position corresponding to the first of the following month, a feed mechanism for the date member having a reciprocating movement corresponding to at least the greatest number of date steps required for sluiting the date member from the last day of one month to the first day of the following month and operative to effect the normal one-step feed of the date member, and means having an angular motion about the axis of the month member and adapted for each operation of the feed mechanism at the end of a month to move along and in contact with that part of the surplus feed control curvature of the month member which is in the operative position and together with the feed mechanism control and effect the surplus feed of the date member. I

3. A perpetual date calendar comprising a revoluble date member adapted to be moved step by step, a revoluble month member adapted to be moved step by step and provided with a surplus feed control curvature having deflections for cons trolling the surplus4 feed of the date member angularly displaced but having the same radial displacement relatively to eachother in month and date stepsrso as to control the surplus feed of the date member merely by their angular displacements, means operative to advance the month member a complete month step for each shifting of the date member from the position corresponding to the thirty-first of one month to the position corresponding to the first of the following month, a feed mechanism for the date member having a reciprocating movement corresponding to at least the greatest number of date steps required for shifting the date member from the last day of one month to the rst day of the following month and operative t0 effect the normal one-step feed'of the date member and part of the surplus feed, and means having an angular motion about the axis of the month member and adapted for each operation of the feed mechanism at the end of a month to move along and in contact with that part of the surplus feed control curvature of the month member which is in the operative position and together with the feed mechanismcontrol and effect the surplus feed of the date member.

4. A perpetual date calendar comprising a revoluble date member adapted to be moved step by step, a revoluble month member adapted to be moved step by step and provided-With a surplus feed control'curvature having deflections for controlling the surplus feed of the date member angularly displaced but .having the same radial displacement relatively to each other in month and date steps so as to control the surplus feed of the date member merely by their angular displacements, means operative 'to advance the month member a complete `month step for each shifting of the date memberY from the position corresponding to the thirty-first. of one month member having a reciprocating movement corresponding to at least the greatest number of date steps required for shifting the date member from the last day of one month to the first day of the following month and including a feed member for the normal one-step feed of the date member movable from an inoperative to an operative position and vice versa, means cooperating with the feed member and operative to cause the feed member to move into the operative position during 'the later part of the active feed of the feed mechanism and at a point behind the point at which a feed engagement is required for eifecting the normal feed of the date member, and means having an angular motion about the aXis of the month member and adapted for each operation of the feed mechanism at the end of a month to move along and in contact with that part of the surplus feed control curvature of the month member which is in the operative position and together with the feed mechanism control and eifect the surplus feed of the date member.

5. A perpetual date calendar comprising a revoluble date member adapted to be moved step by step, a revoluble month member adapted to be moved step by step and provided with a surplus feed control curvature having deflections for controlling the surplus feed of the date member angularly displaced but having the same radial displacement relatively to each other in month and date steps so as to control the surplus feed of the date member merely by their angular displacements, a leap yearcontrol member cooperating with the surplus feed control curvature of the month member, a revoluble leap year member cooperating with the leap year control member, means operative to advance the month member a complete month step for each shifting of the date member from the position corresponding to the thirty-first of one month to the position corresponding to the flrst of the following month, means for advancing the leap year member responsive to the movement of the month member, a feed mechanism for the date member having a reciprocating movement corresponding to at least the greatest number of date steps required for shifting the date member from the last day of one month to the first day of the following month and operative to effect the normal one-step feed ofthe date member, and means having an angular motion about the axis of the month member and adapted for each operation of the feed mechanism at the end of a month to move along and in contact with that part` together with the feed mechanism control andv effect the surplus feed of the date member.

6. A perpetual date calendar comprising a revoluble date member adapted to be moved step by step, a revoluble month member adapted. to be moved stepby step and provided with a surplus feed control curvature having deflections for controlling the surplus feed of the date member angularly displaced but having the same radial displacement relatively to each other in month and date steps so as to control the surplus feed of the date member merely by their angular displacements, a leap year control member cooperating with the surplus feed control curvature of the month member and movable from an operative to an inoperative position, a revoluble leap year member cooperating with the leap year control member and operative to move the leap year member from the operative to the inoperative position and vice versa, means operative .to advance the month member a complete month step for each shifting of the date member from the position corresponding to the thirty-first of one month to the position corresponding to the first of the following month, means operative to advance the leap year member for eachadvancement of the month member, a feed mechanism for the date member having a reciprocating movement corresponding to at leastV the greatest number of date steps required for shifting the date member from the last day of one month to the rst day of the following month and operative toA effect the normal onestep feed of the date member, and means having an angular motion about the axis of the month member and adapted for each operation of the feed mechanism at the end of a month to move along and in contact with that part of the surplus feed control curvature of the month member which is in the operative position and together with the feed mechanism control and effect the surplus feed of the date member.

7. A perpetual date calendar comprising a revoluble date member adaptedy to be moved step by step, a revoluble month member adapted to be moved step by step and provided with a surplus feed control curvature having peripherical guide faces comprising cams and indentations integral with the month member the angular sides of which are adapted to determine the time for operation of the surplus feed and the peripherical lengths of which are adapted to determine the length of the surplus feed, a leap year control member cooperating with the surplus feed control curvature of the month member and movable from an operative to an inoperative position, a revoluble leap year member cooperating with the leap year control member and operative to move the leap'year member from the operative tothe inoperative position and vice versa, means operative to advance the vmonth vmember a complete month step for each shifting of the date member from the position corresponding to the thirty-first of on-e month to the position corresponding to the first of the following month, means operative to advance the leap year member for each advancement `of the month member, a feed mechanism for the date member having a reciprocating movement corresponding to 'at-the least four date steps of the date member and operative to effect the normal one-step feed of the date member and part of the surplus feed thereof, and means having an angular motion about the axis of the month member and adapted for each operation of the feed mechanism at .the end of a month to move along Vand in contact withthat part of the surplus feed control curvature of the month member which is in the operative position and together with` the feed mechanism control and effect the surplus feedof the date member.

8. A perpetual date calendar comprising a revoluble date member adapted to be moved .step

by step, a revoluble month member adapted to be moved step by step and provided with a surplus feed control curvature having deflections -the angular displacements of which, relatively to each other, are effective for controlling the surplus feed of the date member, means,` operative to advance the month member one month step for each shifting of the date member from the last day of one month to the rst day of the following month, means cooperatingv/ithl thesurplus feed.V

control curvature of the month member and operative to effect the surplus feed of the date memberV responsive to the surplus feed control curvature of the month member and means operative to take over the surplus feed at a point Where it is not completed and to Vcomplete the same.

9. A perpetual date calendar comprising a revoluble date member adapted to be moved step by step, a revoluble month member adapted to be moved step by step and provided with a surplus feed control curvature having deflections the angular displacements of which, relatively to each other, are effective for controlling the surplus feed of the date member, means operative to advance the month member one month step for each shifting of the date member from the last day of one month to the rst day of the following month, a feed mechanism for the date member having a reciprocating movement corresponding to at least the greatest number of date steps required for shifting the date member from the last day of one month to the first day of the following month and operative to effect the normal feed of the date member, and a surplus feed member adapted tomove with the feed mechanism in contact with the surplus feed control curvature of the month member and operative to effect the surplus feed of the date member responsive tothe surplus feed control curvature of the month member.

10. A perpetual' date calendar comprising a revoluble date member having at least thirty-one date steps and adapted to be shifted step by step, a revoluble month member having twelve month steps, adapted to be shifted step by step and provided with a surplus feed control curvature having indentations integral with the month member and angularly displaced, relatively to each other, so as to control the point of engagement for effecting the surplus feed of the date member, means for shifting the month member responsive to the movement of the date member, a feed mechanism for the date member having a reciprocating feed movement corresponding to at least the greatest number of date steps required for shifting the date member from the last day of one month to the first day of the following month and including a feed member operative to effect the normal feed of the date member, and a surplus feed member for effecting the surplus [feed of the date member adapted to move with the feedmechanism in contact with the surplus feed control curvature of the month member and operative to effect the surplus feed of the date member responsive to the surplus feed control curvature of the month member.

l1. A perpetual date calendar comprising a revoluble date member having at least thirty-one date Vvsteps and adapted to be shifted step by step, a revoluble month member having twelve month steps. adapted to be shifted step bv step and provided with a surplus feed control curvature having indentations integral with the month member and angularly displaced. relatively to each other, so as to control theY point of engagef ment for effecting the surplus feed of the date member, means for shifting the month member responsive to the movement of the date member, a leap year control member cooperating with the surplus feed control curvature of the month member and movable from an inoperative to an operative position, a revoluble leap year member cooperating with the leap year control member and operative to move the leap year control memberfrom the inoperative to the operative position,

-means for advancing the leap year member for each advancement of the month member, and a feed mechanism for the date member having an effective feed movement corresponding to at least four date steps of the date member and including a feed member operative to effect the normal feed of the date member, and a surplus feed member for effecting the surplus feed of the date member adapted to move with the feed mechanism in contact with the surplus feed control curvature of the month member and operative to effect the surplus feed of the date member responsive to the surplus feed control curvature of the month member.

12. A perpetual date calendar comprising a date member in the form of a revoluble disc having thirty-one teeth and adapted to be shifted step by step, a month member in the form of a revoluble disc coaxial with the date member, having twelve teeth, adapted to be shifted step by step and provided with indentations along its periphery displaced relatively to each other approximately 60, 60, 90, 60 and 90 degrees and having peripherical lengths effective for controlling the surplus feed of the date member, a gear wheel having six teeth meshing with the teeth of the month member, means for causing the date member for each shifting thereof from the last day of one month to the first day of the following month to shift the six-toothed gear wheel one tooth, a feed mechanism forthe date memberhaving a reciprocating movement about the common axis of theV date and month members corresponding to at least the greatest number of date steps required for shifting the date member from the last day of one month to the rst day of the following month and including a normal feed member operative to engage with the teeth of the date member and to shift the date member one step for each active feed movement of the feed mechanism, Vand a surplus feed member adapted to move with the feed mechanism and to engage with the date member at one point thereof and to move in contact with the indented periphery of the month member and thereby ei"- fect the surplus feed of the date member responsive to the indentations of the month member.

13. A perpetual date calendar comprising a date member in the form of a revoluble disc having thirty-one teeth and adapted to be shifted step by step, a month member in the form of a revoluble disc coaxial with the date member, having twelve teeth, adapted to be shifted step by step and provided with indentations along its periphery displaced relatively to each other approximately 60, 60, 90, 60 and 90 degrees and having peripherical lengths effective for controlling the surplus feed of the date member, a'gear wheel having six teeth meshing with the teeth of the month member, means for causing the date member for each shifting thereof from the last day of one month to the rst day of the following month to shift the six-toothed gear wheel one tooth, a leap year control member movably secured to the month member so as Vto cooperate with one of the indentations in the month member and movable from an inoperative to an operative position, a leap year member in the form of a revoluble disc coaxial with the date and month members and having a leap year control curvature cooperating with the leap year control member, a gear'connecting the leap year member with the month member and operative to advance the'leap year member for each advancement of the month member, a feed mechanism for the date member having a reciprocating movement about the common axis of the date and month members corresponding to at least the greatest number of date steps required for shifting the date member from the last day of one month to the rst day of the following month and including a normal feed member operative to engage with the teeth of the date member and to shift the date member one step for each active feed movement of the feed mechanism, and a surplus feed member movable with the feed mechanism and operative to engage with the date member at one point thereof and to move in contact with the indented periphery of the month member and thereby effect the surplus feed of the date member responsive to the indentations of the month member.

14. A perpetual date calendar comprising a revoluble date member adapted to be moved step by step, a revoluble month member adapted to be moved step by step and provided with a surplus feed control curvature having deections the angular displacements of which, relatively to each other, are effective for controlling the surplus feed of the date member, means operative to advance the month member one month step for each shifting of the date member from the last day of one month to the first day of the following month, a feed mechanism for the date member having a reciprocating movement corresponding to at least the greatest number of date steps required for shifting the date member from the last day of one month to the first day of the following month and including a feed member operative to effect the normal as well as the surplus feed of the date member, and a surplus feed control member adapted to move with the date member in contact with the surplus feed control curvature of the month member and to cooperate with the feed member of the feed mechanism for controlling the surplus feed of the date member.

15. A perpetual date calendar comprising a revoluble date member having at least thirty one date steps and adapted to be shifted step by step, a revoluble month member having twelve month steps, adapted to be shifted step by step and provided with a surplus feed control curvature having cams integral with the month member and angularly displaced, relatively to each other, so asY to control the point of engagement for effecting the surplus feed of the date member, means for shifting the month member responsive to the movement of the date member, a feed mechanism for the date member having a reciprocating movement corresponding to at least the greatest number of date steps required for shifting the date member from theV last day of one month to the rst day of the following month and including a feed member operative to effect the normal as well as the surplus feed of the date member, and a surplus feed control member adapted to move with the date member in contact with the surplus feed control curvature of the month member and to cooperate with the feed member of the feed mechanism for controlling the surplus feed of the date member responsive to the surplus feed control curvature of the month member.

16. A perpetual date calendar comprising a revoluble date member` having at least thirty one date steps and adapted to be shifted step by step, a revoluble month member having twelve month steps, adapted to be shiftedstep by step and provided with a surplus feed control curvature having cams integral with the month member and angularly displaced, relatively to each other, so as to control the point of engagement for effecting the surplus feed of the date member. means for shifting the month member responsive to the movement of the date member, a leap year control member cooperating with the surplus feed control curvature of the month member and movable from an inoperative to an operative position, a revoluble leap year member cooperating with the leap year control member and operative to move the leap year control member from the inoperative to the operative position, means for advancing the leap year member for each advancement of the month member, a feed mechanism for the date member having a reciprocating movement corresponding to at least four date steps of the date member and provided with a feed member operative to effect the normal as well as the surplus feed of the date member, and a surplus feed control member adapted to move with the date member in contact with the surplus feed control curvature of the month member and to cooperate with the feed member of the feed mechanism for controlling the surplus feed of the date member responsive to the surplus feed control curvature of the month member.

17. A perpetual date calendar comprising a date member in the form of a revoluble disc having thirty one teeth and adapted to be shifted step by step, a month member in the form of a revoluble disc coaxial with the date member, having twelve teeth, adapted to be shifted step by step and provided with cams along its periphery displaced relatively to each other approximately 60, 60, 90, and 90 degrees and having peripherical lengths effective for controlling the surplus feed of the date member, a gear wheel having six teeth meshing with the teeth of the month member, means for causing the date member for each shifting thereof from the last day of one month to the, rst day of the following month to shift the six-toothed gear wheel one tooth, a feed mechanism for the date member having an effective feed movement corresponding to at least four date steps of the date member and provided with a feed member operative to effect the normal as well as the surplus feed of the date member, and a surplus feed control member adapted to move with the date member in Contact with the projected periphery of the month member and to cooperate With the feed member of the feed mechanism for controlling the surplus feed of the date member responsive to the surplus feed control curvature of the month member.

18. A perpetual date calendar comprising a date member in the form of a revoluble disc having thirty one teeth and adapted to be shifted step by step, a month member in the form of a revoluble disc coaxial with the date member, having twelve teeth, adapted to be shifted step by step and provided with cams along its periphery displaced relatively to each other approximately 60, 60, 90, 60 and 90 degrees and having peripherical lengths effective for controlling theL surplus feed of the date member, a gear wheel having six teeth meshing with the teeth of the month member, means for causing the date member for each shifting thereof from the last day of one month to the rst day of the following month to shift the six-toothed gear wheel one tooth, a leap year control member movably secured to the month member so as to cooperate with one of the cams of the month member and movable from an inoperative to an operative position, a leap year member in the form of a revoluble disc coaxial with the date and month members and having a leap year control curvature cooperating with the leap year control member, a gear connecting the leap year member with the month member and operative to advance the leap year member for each advancement of the month member, a feed mechanism for the date member having an effective feed movement correspondingle to at least four date steps of the date member and provided With a feed member operative to effect the normal as well as the suplus feed of the date member, and a surplus feed control member adapted to move with the date member in contact with the projected periphery of the month member and to cooperate with the feed member of the feed mechanism for controlling the surplus feed of the date member responsive to the surplus feed control curvature of the month member.

JOSUA GABRIEL PAULIN. 

